| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License. |
| |
| #ifndef IMPALA_UTIL_MEM_RANGE_H |
| #define IMPALA_UTIL_MEM_RANGE_H |
| |
| #include <cstdint> |
| |
| #include "common/logging.h" |
| |
| namespace impala { |
| |
| /// Represents a range of memory. This is a convenient alternative to passing around |
| /// a separate pointer and length. |
| class MemRange { |
| public: |
| MemRange(uint8_t* data, int64_t len) : data_(data), len_(len) { |
| DCHECK_GE(len, 0); |
| DCHECK(len == 0 || data != nullptr); |
| } |
| |
| uint8_t* data() const { return data_; } |
| int64_t len() const { return len_; } |
| |
| static MemRange null() { return MemRange(nullptr, 0); } |
| |
| private: |
| uint8_t* data_; |
| int64_t len_; |
| }; |
| } |
| |
| #endif |